Wanting froyo back.

Ok so I had gotten the rooted version of the leaked GB then installed the liberty GB v4. Ever since my contacts will not show unless someone I had saved in before ii switched over to GB calls or texts. Secondly I miss my ability to tether when I need to.

I downloaded the drivers as well as the latest RSDlite but it will not see my phone. From what I have read I can't simply flash from my recovery image so what else can I do to get back to 2.2 froyo?